“I think there's a difference between having a bestselling book - meaning through marketing, PR and buying that first wave of customers - and writing a bestselling book. The second implies that the product propels itself to the best seller list.”

American entrepreneur, investor, author, podcaster

Timothy Ferriss is an American entrepreneur, investor, author, podcaster, and lifestyle guru. He is known for his 4-Hour self-help book series, including The 4-Hour Work Week, The 4-Hour Body, and The 4-Hour Chef. Those books made him widely known for advice on optimizing everyday life, though he has since reconsidered that approach. He has also supported scientific research into psychedelic treatments, extending his public work beyond the self-help genre.